Messages in this thread Patch in this message | | | Date | Tue, 26 Jan 2016 21:52:44 +0100 | From | Oleg Nesterov <> | Subject | Re: WARNING in do_jobctl_trap |
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On 01/26, Dmitry Vyukov wrote: > > Hello, > > The following program triggers WARN_ON_ONCE(!signr) in do_jobctl_trap:
Can't reproduce, but most probably I understand the problem... I'll try to make the simplified test-case tomorrow, it should work if I am right.
Does it work for you reliably? If yes, any chance you can try the patch below?
Oleg.
--- x/kernel/ptrace.c +++ x/kernel/ptrace.c @@ -73,11 +73,11 @@ void __ptrace_unlink(struct task_struct *child) { BUG_ON(!child->ptrace); - child->ptrace = 0; child->parent = child->real_parent; list_del_init(&child->ptrace_entry); spin_lock(&child->sighand->siglock); + child->ptrace = 0; /* * Clear all pending traps and TRAPPING. TRAPPING should be
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